The McCormick 3682177M1 Ring is a genuine OEM component designed for the Power Take-Off (PTO) system in a wide range of McCormick agricultural tractors. This essential ring ensures proper sealing and function within the PTO assembly. With an inner diameter of 45mm, an outer diameter of 51mm, and a thickness of 3mm, it provides a precise fit for compatible models including McCormick C, CX, F, MC, MTX, T, V, X, XTX, and Z series tractors, ensuring reliable performance and durability.